<template>
  <div class="permission-container">
    <div class="app-container">
      <!-- 表格 -->
      <el-card>
        <div style="text-align: right; margin-bottom: 20px">
          <el-button type="primary" size="small" @click="hAdd(1, '0')">添加权限</el-button>
        </div>
        <el-table border :data="list" row-key="id">
          <el-table-column label="名称" prop="name" />
          <el-table-column label="标识" prop="code" />
          <el-table-column label="描述" prop="description" />
          <el-table-column label="操作">
            <template v-slot="{row}">
              <!-- type为 1 表示页面级别的权限，它可以继续做添加，添加这个页面上的按钮级别的权限
              这里是按钮级别权限 type=2 -->
              <el-button v-if="row.type===1" type="text" @click="hAdd(2, row.id)">添加</el-button>
              <el-button type="text" @click="hEdit(row.id)">编辑</el-button>
              <el-button v-if="row.children.length === 0" type="text" @click="hDel(row.id)">删除</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>
    </div>
    <!-- 添加/编辑 的弹窗 -->
    <el-dialog :visible.sync="showDialog" :title="isEdit ? '编辑' : '添加'" @close="$refs.refForm.resetFields()">
      <!-- 表单内容 -->
      <el-form ref="refForm" :model="formData" :rules="rules" label-width="100px">
        <el-form-item label="权限名称" prop="name">
          <el-input v-model="formData.name" />
        </el-form-item>
        <el-form-item label="权限标识" prop="code">
          <el-input v-model="formData.code" />
        </el-form-item>
        <el-form-item label="权限描述" prop="description">
          <el-input v-model="formData.description" />
        </el-form-item>
        <el-form-item label="权限启用" prop="enVisible">
          <el-switch
            v-model="formData.enVisible"
            active-text="启用"
            active-value="1"
            inactive-text="不启用"
            inactive-value="0"
          />
        </el-form-item>
      </el-form>

      <template #footer>
        <div style="text-align: right;">
          <el-button @click="showDialog = false">取消</el-button>
          <el-button type="primary" @click="onSubmit">确定</el-button>
        </div>
      </template>
    </el-dialog>
  </div>
</template>

<script>
import { delPermission, getPermissionDetail, addPermission, getPermissionList, updatePermission } from '@/api/permisson'
import { arrayToTree } from '@/utils'
export default {
  data() {
    const validCode = (rule, value, callback) => {
      // 添加时的校验：code不能重复
      let existCodeList = this.originList
      if (this.isEdit) {
        // 编辑时的校验: code能取自己
        existCodeList = this.originList.filter(item => item.id !== this.formData.id)
      }
      existCodeList.map(it => it.code).includes(value)
        ? callback(new Error(value + '已经占用'))
        : callback()
    }

    const validName = (rule, value, callback) => {
      // 添加时的校验： 名字不能取子元素的名字
      let existNameList = this.originList.filter(item => item.pid === this.formData.pid)
      if (this.isEdit) {
        // 编辑时的校验： 名字不能取兄弟（排除自己）的名字
        // 找兄弟，排除自己
        existNameList = this.originList.filter(item => item.pid === this.formData.pid && item.id !== this.formData.id)
      }
      existNameList.map(it => it.name).includes(value)
        ? callback(new Error(value + '已经占用'))
        : callback()
    }
    return {
      list: [],
      // 表单
      isEdit: false,
      showDialog: false, // 是否显示弹层
      formData: {
        name: '', // 名称
        code: '', // 权限标识
        description: '', // 描述
        enVisible: '0', // 开启
        pid: '', // 添加到哪个节点下
        type: '' // 类型
      },
      rules: {
        code: [{ message: '不能为空', required: true, trigger: 'blur' }, { validator: validCode, trigger: 'blur' }],
        name: [{ message: '不能为空', required: true, trigger: 'blur' }, { validator: validName, trigger: 'blur' }]
      },
      originList: [] // 在做校验时需要用到的数据
    }
  },
  created() {
    this.loadPermission()
  },
  methods: {
    // 点击了编辑
    async hEdit(id) {
      this.isEdit = true
      // 1.打开弹窗
      this.showDialog = true
      // 2.发请求 根据id拿到详情
      const { data: res } = await getPermissionDetail(id)
      console.log('``', res)
      // 3.填充在表单中
      this.formData = res
    },
    // 删除
    async doDel(id) {
      // 1.发送删除请求
      await delPermission(id)
      // 2.提示用户
      this.$message.success('删除成功')
      // 3.刷新页面
      this.loadPermission()
    },
    hDel(id) {
      this.$confirm('确定要删除吗？', '系统提示').then(() => {
        this.doDel(id)
      }).catch(() => {})
    },
    async doAdd() {
      // 1.调接口添加
      const { data: res } = await addPermission(this.formData)
      console.log(res)
      // 2.关闭弹窗
      this.showDialog = false
      // 3.提示
      this.$message.success('ok')
      // 4.刷新页面
      this.loadPermission()
    },
    async doEdit() {
      // 1.调接口更新编辑的数据
      const { data: res } = await updatePermission(this.formData)
      console.log(res)
      // 2.关闭弹窗
      this.showDialog = false
      // 3.提示
      this.$message.success('更新成功')
      // 4.刷新页面
      this.loadPermission()
    },
    onSubmit() {
      // 表单校验
      this.$refs.refForm.validate(valid => {
        // 通过校验 就继续判断做修改还是添加
        valid && (this.isEdit ? this.doEdit() : this.doAdd())
      })
    },
    // 点击了添加
    hAdd(type, pid) {
      console.log(type, pid)
      // 记录当前添加的关键信息
      this.formData.type = type
      this.formData.pid = pid
      this.isEdit = false
      this.showDialog = true
    },

    async loadPermission() {
      const { data: res } = await getPermissionList()
      // console.log(res)
      // 数据转树形结构
      this.list = arrayToTree(res)
    }
  }

}
</script>

